¹H NMR (400 MHz, CDCl₃) δ 8.27 (d, J = 7.5 Hz, 2H), 7.58 (t, J = 7.2 Hz, 1H), 7.53 – 7.45 (m, 3H), 7.41 (d, J = 4.7 Hz, 3H), 7.25 (d, J = 5.0 Hz, 5H), 7.15 (d, J = 6.6 Hz, 2H). ¹³C{¹H} NMR (101 MHz, CDCl₃) δ 183.0, 144.2, 138.4, 137.2, 137.1, 132.8, 130.8, 129.0, 128.7, 128.6, 128.4, 128.3, 128.1, 127.5.